Mesh to Micron Conversion Chart - spma-gold.org

1 2/17/13 mesh to Micron Conversion Chart mesh TO Micron Conversion Chart . mesh INCHES MICR ONS MILLIMET ER S. 3 6730 4 4760 5 4000 6 3360 7 2830 8 2380 10 2000 12 1680 14 1410 16 1190 18 1000 20 841 25 707 30 595 35 500 40 400 45 354 50 297 60 250 70 210 80 177 100 149 120 125 140 105 170 88 200 74 230 63 270 53 325 44 400 37 mesh Sizes and Micr ons What does mesh size mean? Figuring out mesh sizes is simple. All you do is count the number of openings in one inch of screen (in the United States, anyway.) The number of openings is the mesh size. So a 4 mesh screen means there are four little squares across one linear inch of screen. A 100 mesh screen has 100 openings, and so on. Note, therefore that as the number describing the mesh size increases, the size of the particles decreases.

2 Higher numbers = finer powder. mesh size is not a precise measurement of particle size. Screens can be made with different thicknesses of wire. The thicker the wires, the smaller the particle passing through that screen, and vice versa. What do the minus ( - ) and plus ( + ) plus signs mean when descr ibing mesh sizes? Here's a simple example of how they work. 200 mesh aluminum would mean that all particles will pass through a 200 mesh screen. A +200 mesh aluminum means that all the particles are retained on a 200 mesh screen How fine do scr eens get? That depends on the wire thickness. But the supplier of our screens does not offer any screens finer than 500. mesh . If you think about it, the finer the weave, the closer the wires get together, eventually leaving no space between them at all.

3 So, beyond 325-400 mesh , we usually describe particle size in microns .. What is a micr on? A Micron is another measurement we use for measuring particle size. A Micron is one-millionth of a meter or one twenty-five 1/2. 2/17/13 mesh to Micron Conversion Chart thousandth of an inch. This table is adapted from a post made by Ken Kosanke to the PML and previously published in a PGII Bulletin. Standar d * Space between wir es Sieve mesh No. Inches Micr ons** Typical mater ial 14 1400. 28 700 Beach sand 60 250 Fine sand 100 150. 200 74 Portland cement 325 44 Silt 400 37 Plant Pollen (1200) 12 Red Blood Cell (2400) 6. (4800) 2 Cigarette smoke * T he mesh numbers in parentheses are too small to exist as actual screen sizes; they are estimated and included just for reference This page gleaned from the colonial virginia high power rocketry site 2/2.